Storing a Parameter to use after an API call inPI

Hi,

I have a query on an API call and the processing in SAP PI.

I get an XML from ECC and within it is a reference and 6 fields used in the API call....I send those 6 in the API call and get back a result. My question is there any way to also keep the reference in a variable (like the way filename for example can be passed thru as paraeter using modules insftp)

so we get in an XML.....call the api but keep the reference somewhere...have the API result come back into PI and then in the mapping back to SAP be able to add back in the reference

Thanks